Question

Is It possible that if I create two TextBoxes.

When the first TextBox is modified from input, the second text box is set to be read only and its value will update depending on what you had written in the first text box.

It’s like when I am posting here in stackoverflow there is also a read only area that follows what I’m typing (The preview window). :)) Thanks!!!

Answer 1

If it’s win-form application, it’s so simple. try this :

    private void txtFirstTextBox_TextChanged(object sender, EventArgs e) {
        if (string.IsNullOrEmpty(txtFirstTextBox.Text)) {
            txtSecondTextBox.Clear();
            return;
        }
        txtSecondTextBox.Text = txtFirstTextBox.Text;
    }

hope this help.